One team will stand alone atop the NFC West after the Seattle Seahawks and San Francisco 49ers do battle at Monster Park.  Both teams are 2-and-1 and tied for first-place in the division.  The Seahawks rallied to top the Cincinnati Bengals 24-21 in Week Three.  Matt Hasselbeck connected with Nate Burleson on a 22-yard touchdown strike with 1:06 remaining to complete the comeback.  The 49ers suffered their first loss of the season, 37-16, at the hands of the Pittsburgh Steelers.  Frank Gore was held to just 39 yards on 14 carries and Alex Smith threw for 209 yards with a TD and a pick in the setback.  The 49ers swept both meetings between the two clubs last season.